>> Microinverters will not work without a grid > Microinverters work fine with some grid spoofing device/inverter > Battery back up systems do it. Tesla PowerWall, for example.
No, just because it produces 60 Hz AC does not make it a Microinverter. Anyone can make an inverter, They are dirt cheap from 1kw to 3 kW and only cost about 15 cents a watt! You can buy a 2 kW "inverter" for not much more than $300. But that does not make it a Grid-Tie microinverer. A grid tie microinverter is a CURRENT SOURCE that pushes current against an existing waveform It has to have an infinite load (the grid) or the voltage will soar out of sight if the load goes down. That is what current sources do. Fundamental EE. Sure, one can design a box that can do both, But that is a complex internal circuitry that does either one or the other, but they are totally different circuits... When the powerwall battery is selling power to the grid, it is using its current-source grid-tie circuitry. When it is islanding as a backup power system without a grid, it is using completely different circuitry as a stand alone inverter. Maybe the circuits can share the same power switching devices on the 120/240 volt side, but the driving circuitry and function are entirely different. And a power wall circuitry is certainly not a "microinverter". Lets keep the terminology clear. Bob -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20190713/924ed96d/attachment.html> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
